sound keeps changing speakers

[blakem5]

i have a 2005 jbl and i installed a sony xav-65 headunit, i'm pretty sure i connected everything right because i'm getting sound out of every speaker just not at the same time. when i hit a bump or bass hits the speakers the front or the rear cut out, I'm thinking that mabie the connectors in the door are loose and mabie there is a loose ground but i'm not sure because i'm not the best with wiring.

 

[alia176]

Did you use a line out converter (LOC) before feeding your Sony HU? The LOCs typically smooths out the sound from each of the four channels by adjusting the potentiometers. But, a bump makes the sound change points to a loose connection somewhere.

 

[wc11]

Since it's happening when you hit a bump, that's gotta be a loose or intermittent connection somewhere.